New findings from members of the Cassini imaging team show that certain prominent features in Saturns narrow and contorted F ring can be understood in terms of a simple gravitational interaction with the small moon Prometheus. The results are published in todays issue of the journal "Nature."
The F ring is notorious for exhibiting unusual structures, like "knots," "kinks," and "clumps" that continue to puzzle astronomers. Cassini images have shown that the gravitational effect of Prometheus appears to produce regular patterns in the ring, including a series of channels or gores in the tenuous ring material interior to the F ring core, and "streamers" of particles that temporarily link the ring to the moon.
Prometheus is only about 100 kilometers (60 miles) wide and orbits just interior to the F ring. The Cassini imaging scientists findings show that Prometheus causes the structure as the moon approaches and recedes from the F ring every 14.7 hours, during its orbit of Saturn.
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The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
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Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
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